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Related Concept Videos

Depressive Disorders: MDD and Dysthymia01:27

Depressive Disorders: MDD and Dysthymia

Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
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Depressive Disorders: Etiology

Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
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Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
Long-term Depression01:03

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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If over time, all...
Long-term Depression01:05

Long-term Depression

Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Bipolar Disorder

Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.

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Related Experiment Video

Updated: Jun 16, 2026

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder
04:33

Association Between Sleep Quality and Cognitive Symptoms in Patients with Major Depressive Disorder

Published on: April 26, 2024

Early onset major depressive disorder.

W P Fleisher1, L Y Katz

  • 1Section of Child and Adolescent Psychiatry, Department of Psychiatry, University of Manitoba.

Paediatrics & Child Health
|January 29, 2010
PubMed
Summary
This summary is machine-generated.

Child and adolescent depression, particularly major depressive disorder (MDD), is a serious condition with significant risks. Effective treatment and ongoing research are crucial for managing this debilitating youth disorder.

Keywords:
DepressionMajor depressionPsychopharmacologyPsychotherapy

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Area of Science:

  • Child and Adolescent Psychiatry
  • Mental Health Research
  • Developmental Psychology

Background:

  • Depression in youth is prevalent and can lead to severe consequences.
  • Co-occurring conditions, behavioral issues, and systemic effects are common.
  • There is a significant risk of suicide associated with youth depression.

Purpose of the Study:

  • To provide a comprehensive overview of child and adolescent depressive disorders.
  • To focus on the clinical diagnosis, presentation, and epidemiology of major depressive disorder (MDD).
  • To discuss coexisting problems and treatment challenges in youth depression.

Main Methods:

  • Literature review and synthesis of existing research on child and adolescent depression.
  • Analysis of clinical diagnosis, presentation, and epidemiological data.
  • Examination of treatment modalities, including psychosocial and pharmacological approaches.

Main Results:

  • Major depressive disorder (MDD) is a common and debilitating condition in young people.
  • Depression in youth is associated with significant comorbidities and behavioral sequelae.
  • Current treatment relies on clinical judgment, with rigorous research still developing.

Conclusions:

  • Active treatment and further research for MDD in children and adolescents are strongly indicated.
  • The chronicity of impaired psychosocial functioning necessitates ongoing management.
  • Addressing remission, recurrence, and morbidity is essential for improving outcomes.